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SubjectRE: Kernel oops in mm/slab.c [ kmem_cache_grow() ] with test4-8
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<TITLE>RE: Kernel oops in mm/slab.c [ kmem_cache_grow() ] with test4-8</TITLE>
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<P><FONT SIZE=2>&gt; -----Original Message-----</FONT>
<BR><FONT SIZE=2>&gt; From: Andrew Morton [<A HREF="mailto:andrewm@uow.edu.au">mailto:andrewm@uow.edu.au</A>]</FONT>
<BR><FONT SIZE=2>&gt; Sent: Friday, September 15, 2000 11:47 PM</FONT>
<BR><FONT SIZE=2>&gt; To: Earle, Jonathan [KAN:1A31:EXCH]</FONT>
<BR><FONT SIZE=2>&gt; Cc: Linux MPLS List (E-mail); Linux Kernel List (E-mail)</FONT>
<BR><FONT SIZE=2>&gt; Subject: Re: Kernel oops in mm/slab.c [ kmem_cache_grow() ] </FONT>
<BR><FONT SIZE=2>&gt; with test4-8</FONT>
<BR><FONT SIZE=2>&gt; </FONT>
<BR><FONT SIZE=2>&gt; </FONT>
<BR><FONT SIZE=2>&gt; &gt; Jonathan Earle wrote:</FONT>
<BR><FONT SIZE=2>&gt; &gt; </FONT>
<BR><FONT SIZE=2>&gt; &gt; Hi,</FONT>
<BR><FONT SIZE=2>&gt; &gt; </FONT>
<BR><FONT SIZE=2>&gt; &gt; I've been having kernel oopses with the 2.4.0-test series and am</FONT>
<BR><FONT SIZE=2>&gt; &gt; including ksymoops processed output from both test4 and test5</FONT>
<BR><FONT SIZE=2>&gt; &gt; kernels.&nbsp; The same oops happens in later kernels too (Tested with</FONT>
<BR><FONT SIZE=2>&gt; &gt; test6, test7 and test8).</FONT>
<BR><FONT SIZE=2>&gt; &gt; </FONT>
<BR><FONT SIZE=2>&gt; </FONT>
<BR><FONT SIZE=2>&gt; Presumably mpls_output() is doing a kmalloc(..., GFP_KERNEL) </FONT>
<BR><FONT SIZE=2>&gt; from within</FONT>
<BR><FONT SIZE=2>&gt; a softirq.&nbsp; Hunt that down and turn it into GFP_ATOMIC.</FONT>
</P>

<P><FONT SIZE=2>Okay... Did that (turned all the GFP_KERNEL refereces in net/mpls to GFP_ATOMIC, and the problem seems to have gone away, I'll post a more confident summary when I'm more sure that things are working properly.</FONT></P>

<P><FONT SIZE=2>Now, what did I do (aside from fixing the problem) by changing that reference?</FONT>
</P>

<P><FONT SIZE=2>Many thanks for the hint!! </FONT>
</P>

<P><FONT SIZE=2>Jon</FONT>
</P>

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